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Problem with Cox land line, connected to Cisco modem DPQ3212. I cannot hear a ring tone
on only certain local numbers. Everything else works normally. The called party
phone rings normally, the phone is answered, and a normal conversation can be made.
This problem occurs consistently on about 5-10% of numbers I normally call. No help
rebooting modem. What's wrong?
The problem is not a dial tone - it's a missing RING tone. Meaning, after i dial there is total silence until someone answers the phone.
The problem is not intermittent - it is consistent on only a few specific phone numbers.
The phone is plugged into the back of the modem and is in a well-ventilated area.
As far as I can determine, the problem only occurs on 2 numbers, both Sprint cell phones - not used as land line numbers.
This brings up the question: Who generates the ring signal, Cox or Sprint?
Have you tried calling the numbers you can't on Cox from another carrier or cell phone besides Cox? Sounds like a Sprint switch issue.